bpsk调制序列产生子程序.m

来自「MATLAB的源程序,包括产生随机传输数据data的子程序,eject_seq发」· M 代码 · 共 24 行

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%modulate_seq  调制序列产生子程序         即在每个扩频码片中加载 5个载波  每个载波采样6个点
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function [modulate_seq]=modulate_seq(connections_1,begin_state_1,connections_2,begin_state_2)            %carrier_frequency   载波频率   采用BPSK调制
%fc=carrier_frequency;                         %该程序中设定每个扩频CHIP中含5个载波 每个载波6个采样点 即45度间隔
eject_seq=eject_seq(connections_1,begin_state_1,connections_2,begin_state_2);
sample_value=[0 0.5 0.5 0 -0.5 -0.5 0 0.5 0.5 0 -0.5 -0.5 0 0.5 0.5 0 -0.5 -0.5 0 0.5 0.5 0 -0.5 -0.5 0 0.5 0.5 0 -0.5 -0.5];
A=length(eject_seq);
modulate_seq=zeros(1,6*A*5);
eject_seq1=eject_seq;
for i=1:A
    if eject_seq1(i)==1
        for j=1:30
            modulate_seq((i-1)*30+j)=sample_value(j);
        end
    elseif eject_seq1(i)==-1
        for j=1:30
            modulate_seq((i-1)*30+j)=-sample_value(j);
        end
    end
end
t=1:2075760;
stairs(t,modulate_seq);axis([0,2075765,-2,2]);